Depends on what the problem actually is, proceedure is normally to get the box out and have a look.
Possibilities are, clutch worn out, sad but true, unlikely to be paid for by warranty.
Oil leak from box onto clutch, have seen this on a sportage
DMF failure causing slip, seen a couple of carens with this.

 

thanks ringing dealer mon morn will let all know outcome

 

ok car being looked at this fri, suspected oil leak onto clutch plate, fingers crossed covered by warrenty

 

car checked out dealership uncertain about clutch slip , was told that if gearbox is dropped and no fault found i will be liable for costs involved, 75£ per hour approx 5hrs . will wait for clutch to get worse before taking on these possible costs, or maybe bite the bullet and go to independent garage will keep you all informed ,watch this space.